The drive will spin faster at the beginning of a CD, since it's tracked from the center, outward, and will spin more slowly as it progresses over this radius.
Equipment reviews in the old days of "Audio" and "High Fidelity" magazines frequently mentioned the practical aspects of reviewed equipment - like for instance, motor/running noise from tape decks or turntables, lamination vibration or hum from power transformers, and even the "feel" of switches & controls.
It's rare to find this sort of info, anymore, with most reviews now focusing on nebulous, subjective descriptions and technical measurements that offer little in the way of explaining how a new piece of equipment will behave in your home, in a real-world circumstance.
Some of us actually locate our audio equipment close-by our listening position, and mechanical noise or vibration can be an important practical consideration when purchasing a new component.
It's disappointing to learn of this drive noise - this is not something that's unpreventable, or beyond a reasonable engineering & manufacturing consideration. McIntosh should be *the* leader in this sort of refinement, and not find itself in a defensive or rationalizing position of explaining why their CD players aren't dead-quiet.